Grooving plane



A. N. WIGTIL.

GROOVJNG PLANE. APPLICATION m JULY 9.1921.

Patented (M. M, 19252.

- 2 shins-SHEET ,1.

A. N. WIG TIL. GRO OVING PLANE. APPLICATION FILED'JULY 9,192]. I

Patented Oct. 241, 1922.

2 SHEETS-SHEET 2.

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Fatented @et, 24 lldfidm utu'rnu enoovine rnnun.

To: all whom it may concern i a Best known that Anunn'r N. Wio'rtm, a

citizen of the United States of America, re-

siding at VValcott, in the county of Richland and State of North Dakota,has invented new and useful Improvements in trrooving Pla1ies',oi. whichthe following is a specification.

The object of the invention is to provide a relatively simple andefficient grooving plane adapted to be used in forming either straightwalled or under-cut or dove-tailed gains or grooves which are parallelsided or adapted for the reception of tapered keys or wedges and moreespecially to cut cross grain grooves independently of the use of anyother tool except a saw in door window j ambs, for keyseats, stairtreads and the like and more particularly to cut grooves underconditions in which accuracy in depth and width, and uniformity indimensions where a number of similar grooves are to be a on the planeindicated by the line 4-4 of formed may be secured without loss of timeor especial measurement from time to time as the work progresses; andwith these objects in view the invention consists in a construction andcombination of parts of which a preferred embodiment is shown in theaccompanying drawings, wherein Figure 1 is a perspective view of agrooving plane embodying the invention.

Figure 2 is a transverse sectional View on the plane indicated by theline 2-2 of Figure 1.

Figure 3 is a transverse section on the plane indicated by the line 3-3of Figure 1.

Figure 4: is a longitudinal sectional View Figure Figures 5, 6 and 7 aredetail views of forms of gains or grooves which can be produced by meansof the tool.

Figure 8 is a detail elevational View showing the rotatable spindle onone of the handles and its attendant pinion.

Figure 9 is a detail plan view of the cam plate and associated rack andoperating pinion the handle spindle being shown in section.

a Figure 10 is a detail perspective showing one of thebits or cuttersused in connection with the device.

The device consists of a base plate 10 provided with terminal upstandinghandles or grips 11 and 12 and having an intermediate clearance opening13 through which the bit Application filed July 9, 1921. Serial lilo.483,531.

orputter 14 extends and operates, the stem 15 of said bitbeing arrangedin an upright guide16 formed 111 the guide block 17 and being engaged atits upper threaded portion above the block by gauge nuts 18 and a jamnut 19.:

vThe shank is further provided with a lateral key or lpg 20 engaged by aslideplate 21 fitted in a transverse guide 22 in the guide block andprovided with a diagonal cam slot 23 for the reception of said lug orkey, the slide plate having connection with a rack 24 of which the teethare engaged by a pinion 25 carried by thespindle 26 of the grip orhandle 12 which is revolubly mounted upon the base.

The bit or cutter is preferably tapered or reduced in width from itscutting edge t0- ward the shank or stem and is inclined downwardly fromits shank OPSlZBlll toward its cutting edge with relation to the planeof the under or bearing surface of the base plate as shown clearly inFigure 2.

a In preparation for the use of the plane it is only necessary to cutthe stock which is to be inortised by means of a saw or like tool toform the walls of the proposed groove, either obliquely as indicated inFigure 5 or square as indicated in Figure 6 and then to set the bit orcutter at ashallow depth with its cutting edge slightly below the planeof the under surface of the base plate and with the set nut disposed atan adjustment on the stem of the bit, in accordance with the graduationsthereontoto indicate the depth to which the groove is to be cut, lockingthe set nut by means of the jam nut. Then as the cutting operationproceeds by the reciprocatory movement of the plane the revoluble handle12 may be turned slightly after each stroke to feed the bit-downwardthrough the agency of the cam slot until checked by the gauge nut. Bymaintaining a uniform adjustment of the latter it is obvious that anumber of grooves of the same depth may be cut succes sively with anaccuracy which is impossible with the use of ordinary tools such as ahand chisel or gouge.

lln forming a seat such as that shown in Figure 5, the closed end of thegroove is formed preferably by a wood bit and the sides defining thegroove by the usual saw kerfs, the stock between the kerfs being removedby the plane as in the formation of those shown in Figures 6 and 7.

Having described the invention, What is elalmed as new and useful 1s:

1. A grooving plane havmg a base plate provided with manual grips orhandles, a

bit having a stem mounted in a guide carried by the base plate formovement in a direction perpendicular to the plane of the latter andlocated in a position between said grips or handle, and means forimparting movement to the bit with relation to the plane of the baseplate and consisting of a cam plate having an interlocking slidingengagement with the stem of the bit and rack and pinion operating meansfor said cam plate, one of said grips or handles being :revoluble andsaid pinion being carried thereby. a

2. A grooving plane having a base plate provided with manual grips orhandles and provided with a guide intermediatel disposed between saidhandles, a bit having a stem slidably engaged in said guide and formedwith a lateral pin, a cam plate slidably mounted in the guide and havingadiagonally disposed slot in which said pin slidably engages, one ofsaid handles being rotatable, and operative connections between saidrotatable handle and the cam plate to impart longitudinal movement tothe latter and thereb impart vertical movement to the stem to positionthe bit in the nmnner specified.

In testimony whereof he allixes his signature.

ALBELT N. WIGIIL.

